Dishwasher and impeller therefor



April 1942- G. EL-STOKHAM 2,278,953

DISHWASHER AND IMEELLER THEREFOR Filed May 11, 1959 2 Sheets-Sheet 1 3M: azfifmez m. I

April 7, 9 v G. EQSTOCKHAM 2,278,953,

DISHWASHER AND IMPELLER THEREFOR Filed May 11, 1959 2 Sheets-Sh eet 2' ate.

Other and incidental objects of the invention Patented Apr. 7

UNITED? STATES. PATENT OFFICE DISHWASHER. AND manner: 'rna mron Gordon E. Stockham, Piqua, Ohio Application May 11, use, SerialNo. 273.101 2 Claims. ICl. zoo-c3) This invention relates to an improved dish washer and impellertherefor.

One object of the invention is to provide adish washer impeller which will project streams of water at various tangents within the dish washer housing 'so that highly eflicient dish washing operation will be assured.

width of the body I and comprises arelatively Another object of the invention is to provide a dish washer wherein the impeller comprises a pair of concave disks having a blade confined thereb'etween, said disks and blade defining an axial opening and-a radial discharge opening,

the axial opening being larger than the discharge opening so that liquid will be discharged in concentrated streams tangentially with respect to the periphery of the impeller.

A further object of the invention is to provide a dish washer impeller which will eliminate splash.

As a further object; the invention seeks to provide a dish washer having a body which is formed with an improved trough which will include a shoulder forretaining water beneath the impeller until it has reached the position for projection at the proper tangent.

Another objeet of the invention is to provide a dish washer wherein the trough will tend to retain food particles'and keep them' out of circulation within the dish washer body.

And as a still further object, the invention seeks to provide a dish washer, the impeller of which will not vibrate when in use.

And anotherobject is to provide a dish washer I which is simple in construction and easy to operline 2-2 of Figure-1,

. Figure 3 is a side elevation, enlarged, showing the impeller,

I Figure 4 is an enlarged vertical sectional view of the impeller, and

- Figure 5 is a sectional view on the line 5-5 of Figure 3.

Referring now more particularly to the accom- 1 pam'ing drawings, wherein like reference numerals designate like parts throughout the vari ous views, the numeral I indicates in generalthe body of my improved dish washer. The body I has side walls 2 and 3,'a removable top wall, or as lid, I, and abottom wall 5, which is inclinedfrom its outer extremities toward its inner confronting ends.

Formed integral with the bottom 'wall 5 is an impeller trough, shown generally at 6. The impeller trough extends throughout the entire shallow arcuate section 1 and .a relatively deep arcuate section 8. .The sections 1 and 8 are connected 'by a vertical portion which defines a shoulder 9, The arcuate sections I and B are swung on the same axis. However, as will be obvious, the radius of the arcuate section I is Figure 2 of the drawings, the shaft I0 is mounted axially above the trough 6. The shaftIII extends through the side wall 3 and is connected with a motor I3, which is secured to the outer surface 'of the wall 3 near its lower end.

- Located at the opposite side of the body I from the motor I3, on the side wall 2, is an outlet valve casing, having an outlet valve. opening and a valve I 4 therein. An actuating rod I5 is connected with the valve I4 and projects above the casing I2 for manual engagement.

Brackets I 6 are mounted in the. body I, above the shaft I0, and support dish racks I7, of any 35 approved construction.

Mounted on the impeller shaft I0 are impellers l8. Although I have shown eight impellers on the shaft I 0, it should be understood that any desired number, up to the capacity of the shaft, may be used.

.Theimp'ellers I8 are of identical construction, so that a'description of one will sufiice for both. A. typicalimpeller' I 8 is shown in detail in Figures 3, 4 and 5 of the drawings. Said impeller It includes concave disks I 9 and 20 which are connected by an impeller blade 2I Theblade 2| includes blade sections 22 and 2'3,"and an apertured hub 24. The-hub receives the shaft III therethrough. A set screw 25 is passed throughthehub 24 and secures the impeller on the shaft I II. .By referring to Figure 5 of the drawings, it will be seen that the blade sections 22 and 23 are relatively wide and that the webs 26, which connect said sections with the hub, are

relatively narrow.

The'disks l9 and 20 are connected with the blade is by screws 21 so that a rigid unitary construction for the impeller-will be assured. The concave disks [9 and 20 cooperate with each other to define a relatively narrow circular discharge slot or opening 21, and thedisks, furthermore, are provided WithCUt-flWflYfCfilltlfll portions which define relatively large inlet openings 28 and 29 at opposite sides-of the'impeller. As best seen in Figure 4 of the drawings, the blade sections 22 and 23 are curved alternately forwardly and rearwardly for more eilectivelyscooping water therebeneath.

Attention is particularly called to the fact that, as the size of the opening 21 increases, the degree of curvature of the sections 22 and 23 increases, and conversely, as the size of the opening decreases, the curvature of the blades decrease. Any desired number of blades may be used, although it has been found that two blades operate in a highly satisfactory manner.

It will be understood that, as the discharge opening 21 is of less magnitude than the openings 28 and 29, water will be taken into the impeller at a greater rate than it can be discharged. The result will be that the water will leave the high pressure sides of the impeller sections, that is, the front faces of said impeller sections, under high pressure and tangentially thereto, as shown in dotted lines'in Figure 2 of the drawings. The

tangentially disposed streams will be concentrated, however, and will thus assure thorough cleansing of dishes in the body.

It is desired to call attention to the fact that the impeller will not splash when in use. Moreover, as the opening 21 is relatively small, danger of injury to materials dropped about the impeller will be greatly lessened.

The shoulder I will, as stated in the objects oi the invention, retain food particles, and will prevent them from circulating further in the body. The shoulder 9, of course, aids materially in causing the water to be projected in tangential streams.

It is thought that further description of the invention is unnecessary,

Having thus described the invention, what is claimed as new is:

1. In a dish washer, a rotatable impeller including a pair of disks concave in section, a blade, and means connecting the disks to the blade, said blade having a hub and curved blade sections adapted for projecting streams of liquid tang'entially with respect to the impeller upon rotation thereof.

2. In a dish washer as recited in claim 1, wherein the hub is provided with means for detachably securing the impeller to an impeller shaft. 

